Fire door



J. G. ROBINSON.

FIRE DOOR.

APPLICATION FILED AUG. 18. 1919. RENEWEDDEC. 12,19 21.

amuemtoz Patented Feb. 21, 1922.

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sosr

TENT

FIRE noon.

Specification of Letters Patent. Z

OFFICE,

,Pl e t i Fetl-jai; i922.

Application filed August 18,1919, Serial No. 318,254. Renewed December 12, 1921. Serial 1T0. 521927;

To allwhomitmay concern: 1

Be it known that I,-JAY G. ROBINSON,- a citizen :of the United: States, residing at Chicago, in: the mumyor Cook and State, of Illinois, have invented certain new and useful Improvements in Fire Doors; and I'do hereby declare the. followingto be a full,,

clear, and exact description of the invention, such as will enable others skilled: in the, art to which it appertains to make and. use the same. V 3 1 The invention relates to lmechan'ically operated doors and more particularly. to

.doors'forfurnaces, locomotives, boilers and thelike. f. Y

v The particular .object of my invention, broadly stated, is to provide means for maintaining a furnace door in a partially opened position and specificallyto provide means in connection with -fluid operated doors to crack or maintain the same in predetermined j partially opened position, said means acting to prevent thedoor operating fluid pressure from returning themechanism to normal or closed position. To this end; I provide the said; fluid pressure .mechanism with means to engageia Emovablelelement thereof, said means acting against-the fluid pressure and preventing theclosing of the door beyond a certain amount, said means being movable .toj .and"fr,om=-operative position at will.

. The nature of the invention will be apparent from the more :letailed description of Figurel is a the. same when considered in connection with theaccompanyin'g. drawing wherein a single embodiment of the invention isillustrated,

and inwhich; fragmentaryview of a well known fiuid operated. door mechanism: showing the inv'entionap'plied thereto, and

Figures 2 and 3 are respectively, views in front and side elevation of portion of the f device-illustrated in Figure 1 showingthe inventionon a slightly larger scale. a V

Throughout the specification :and drawings like parts are 'designated by like reference characters. x 1 H In the drawings, l designates the door ring or frame which is adapted-to. be :fastened to a furnace, onlocomotive fire box. Door guides2, 2, '(only one of which is shown) are preferably connected, in any suit: able manner to the'sides of the said ring. These guides may be arranged vertically, as shown, so that the furnace door or doors will move parallel with thevj saidy guides.

The doors 3, 3 may be-and preferably are,

slidably mounted in the said. guides 2, 2, and each is provided-with a pivot member. 4 and 5. respectively, to which may be connected, as

er'ablyconnected adjacent its outer endto a bent connecting leveri 10, said lever, 10 being pivotallyconnected. the lever 9. y

the cylinder 11 of thedooropeningandclosmg mechanism, said cylinder, except. ashereat its oppositeend ,to

To one of; the door guides 2"is connected inafter noted being -z'constructed andarranged substantially as shown and described in .thepatent to Shoemaker Number 922,530, jdatedMay;25,,19 09.- ;j I Passing through a suitable opening in the lower end of the cylinder-Hand normally positioned adjacent to the said .enolofthe.

cylinder is the; bifurcated or clevis "end 12 of the pistonrod 13. The: said clevis is adapted to receive one endofa link 1l-.Wl1iCl1 is connected tothe clevisbymeans ofjthe clevis pin 15., The lower-end of the said link 14- is pivotally connected to the lever 10 intermediate the ends of the latterso that a downward. movement of .the piston, rod '13 will cause the said lever to operate the; levers -8 and 9 and force the doorsito open position.

An, upwardmovement of the pistonrod 13,

f th p s ti n i std scfi d; wi u e the lever 1 0. to again operatethe other-levers but in the opposite directiontso that. the

doorsare forced to closed position. I I

To the lower end.- ofthe] cylinder .11, in

place ofithev usual endiclosure, I provide a bracket lti which mayconstitute acylinder head connected tothe cylinder by means-of A the bolts 17 or othersequivalent fastening means, The said bracket preferablyxjhas .a'.

fiat upper face which closes the lower. end of the cylinder and is also provided with a downwardly extending lip for flange 18jwhich I is preferably providedonits inner face with i a pair of intersecting grooves for .recesses 1 9 andQQ. The recess 19 .entends at an angle to the verticalaxis. ofthe cylinder 11. while the recess 20 extends parallelwith the piston L i a-an s a t d .:1 i pahe travel of the pin 15. Passing through the flange 18 and leading to a point at the intersection of the said I which is circular in cross-section. The

grooves is an opening 21'- cracking pawl 22, i. e., the lever by which the doors are adapted to be maintained in cracked or slightly open relation, is preferably formed as an L-shaped piece, having acylindrical shank 23 and a rectangular foot 24. The, said pawl is adapted to be adjustably locked within either groove by means of the spring 25 which surrounds the outwardly projecting end of the shank 23 and which is maintained in position under compression by the washer and key 26. The rectangular foot 24: of; the said pawl is adapted'to closely fit between the side walls of the grooves 19 and 20 so as to be held from turning therein when in either position.

Thegroove' 20 is in ,alinement with the clevis pin l5and the end otthe foot 2% when a in vertical position is adapted to engage the said pin and hold the samefrom upward movement. The length of the foot 24 is preferably so adjusted as to engage the clevis pin and arrest the movement of the piston rod 13 when the doors are cracked or separated a distance of four inches. It is to be understood, however, that this distance may be varied by lengthening or shortening the said foot 24: so as to hold the doors in any desired position. If desired the end of the said foot may be curved as shown at 27 so as to conform to the curvature of the clevis pin 15.

' is then rotated to a position in alinement with the groove 20 and then released,the

spring 25 thereupon forcing the foot 24 into the said groove. The door mechanism is then'releasedf and on the upward movement of the'pistonirod- 13 the cracking pawl 22 engages the 511115 and arrests the doors in spaced relation. To return'the pawl 22to normal position the doors are again openedand the operation'reversed. g

Having now described my invention, what I claim and desire to secure by Letters Patentisi p 1'. The combination with a fire door and fluid controlled means for opening and closing the same, of means for maintaining'said door in a predetermined open position, said last named means being mounted on said first named'meansand adapted to be inter posed between parts thereof.

t .2.The combination with a fire door and fluid controlled means including a cylinder for opening and closing said door, of means vfor hold ng said door in a predetermined open position, said last named means being carried'by said cylinder and adapted to engage a movable element of said fluid con- 1 trolled means.

4. The COIIlblDittlOIl with a'fire door comprising a plurality of slidingmembers and fluid controlled mechanism for operating said sliding members, and means movable to operative and inoperative positions and adapted when in operative position to engage an element of said mechanism to prevent the closing of said members beyond a predeterminedamount.

5. The combination with a fire door comprising a pair of sliding door members and fluid operating mechanism-for opening and closing the same, said mechanism including a cylinder and means comprising a rotatable spring pressed lever carried by said cylinder 7 and adapted to be rotatedto engage. a portion 01 said mechanism to prevent the 010s ing of said door members.

6. The combination with a fire door and fluid controlled means for opening and closing the same, of spring pressed means movable to and from operative position, said means being adapted to engage a portion of said fluid controlled mechanism to prevent the closing of said door, and means formed on said fiuidpressure means for locking said spring pressed means in operative position.

7. The combination with a fire door comprising a pair of sliding door members, and fluid operated mechanism for opening and closing the same, said mechanism including 7 a cylinder, a rotatable L-shaped lever carried by said cylinder and adapted in one position to engage a. portion of said mechanism to prevent the closing of said door members; 8. The combination with a fire 'door com prising a pair of sliding door members, fluid operated mechanism for opening and closing the same, said mechanism including a cylinder.,'a bracket carried'by said'cylinder, said bracket being provided with angularly disposed recesses, a rotatable L-shaped lever carried by said bracket, a portion of the said lGX'QP'bGlDg adapted to fit within either of the said recesses,-tl1e lever being adapted in one position to engage a portion of said mechanism for preventing closing of the JAY e. nosmsoa 

